Name: Are you Afraid of Heights? | Vertigo | #aumsum
Uploaded: 2019-04-15T06:39:24.000Z
Duration: 6 min 30 s
Description: Vertigo is not necessarily fear of heights. In medical terms, vertigo refers to a false sensation of movement due to which we feel dizzy. The most common type of...

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Vertigo is not necessarily fear of heights.

In medical terms, vertigo refers to a false
sensation of movement due to which we feel dizzy.

The most common type of vertigo is Benign Paroxysmal Positional Vertigo or BPPV.

It is caused when our inner ear which helps us maintain balance by detecting motion and position of our body.

Normally, when we move our head, the cilia
and calcium crystals in our inner ear move.

Thus sending signals to the brain about our movement.

However, sometimes some crystals dislodge and move into the fluid filled semicircular canals.

Now, when we move our head, the crystals move along with the fluid.

However, even after our head movement has stopped, the crystals keep moving in the canals.

Thus sending wrong signals to the brain that our head is still moving.

Due to this wrong information, the person gets a false sensation of movement which makes him feel dizzy.

Fireflies glow because they produce light
by a biochemical reaction.

In the lower abdomen of fireflies, there is a chemical called luciferin and an enzyme called luciferase.

When oxygen enters into their lower abdomen through tracheal tubes.

It basically reacts with luciferin in the presence of luciferase.

This production and emission of light by a
living organism is called bioluminescence.

This means the light produced generates very less heat.

Thus, preventing the firefly's abdomen from getting overheated.

However, one more interesting fact is that not only adult fireflies but also their eggs and larvae are bioluminescent.

Honey doesn't spoil mainly because of osmosis.

Osmosis is the movement of water from a region of higher water concentration.

Through a semi-permeable membrane to a region of lower water concentration.

Now, the water content in honey is far less than the water content in organisms like bacteria and fungi.

Hence, when such organisms try to enter honey.

The water from their bodies moves out into the honey due to osmosis.

As a result, they die and thus, the honey
doesn't spoil.

In addition to this, some bees produce antibiotics within their bodies to protect themselves against certain bacteria.

However, when bees make honey, some of these antibiotics get added to the honey.

These antibiotics also prevent the growth
of bacteria, thus preventing the honey from spoiling.

Deep inside the earth, there is a layer of
shale rocks.

These rocks contain fossil fuels like oil
and gas in their pores.

To extract these fuels, a technique called
fracking or hydraulic fracturing is used.

In fracking, a vertical well is drilled into
the layer of shale rocks.

Then, the drill is turned by 90 degrees and
drilling continues horizontally.

When the targeted distance is reached, the
fracking well is encased.

Then, a perforating gun is inserted in the well.

When the perforating gun reaches the required distance, the rocks are perforated.

Then, the perforating gun is removed and a
fracking fluid is pumped in the well.

This fluid builds pressure in the perforations, creating cracks in the rocks, thus releasing the fossil fuels.

These fuels and the fracking fluid are then
drawn to the surface.

Why is oxalic acid used to remove rust stains?

You just don't want my lamp to be nice and
shiny, do you?

Because I know that you are making a fool
out of me.

It is formed when iron reacts with oxygen
and water.

Hence, it is quite difficult to remove rust
stains.

So, how does oxalic acid remove the stain?

Oxalic acid reacts with rust to form iron
oxalate complex ion.

Iron oxalate complex ion is soluble in water.

Thus, it can easily be washed away, helping us remove the rust stain.

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